By doing the call guy option, you'll just paying to get a chance to pull a gold rune since the order is green > blue > purple > gold > red and you're calling for the vanilla guy. It's not guaranteed that you get the gold rune of course. This power system is also used in Bleach Online and has a similar mechanic to eight gates.

This post was last edited by Danzō at 2017-7-20 07:15

Yeah since its not 100% that you'll get the gold rune